WOOTON AND STANDLEY FLOEA OF NEW MEXICO. 723 



1. Hymenothrix wiightii A. Gray, PI. Wright. 2: 97. 1853. 



Type locality: ''On hills between the Barbocomori and Santa Cruz, and on the 

 side of the Chiricahui Mountains, Sonora." 



Range: Southern New Mexico and Arizona and southward. 



New Mexico: Hillsboro; Mogollon Creek; Dog Spring; Organ Mountains. Upper 

 Sonoran and Transition zones. 



2. Hymenothrix wislizeni A. Gray, Mem. Amer. Acad. n. ser. 4: 102. 1849. 

 Type locality: "Grassy places, Ojo de Gallejo, between El Paso del Norte and 



Chihuahua." 



Range: Southern New Mexico and Arizona and southward. 



New Mexico: Mangas Springs; Dog Spring; Organ Mountains; mesa west of Organ 

 Mountains. Low hills and mesas, in the Lower and Upper Sonoran zones. 



102. LEUCAMPYX A. Gray. Wild cosmos. 



Perennial herb, in general appearance like Hymenopappus; invoFucre hemi- 

 spheric, the bracts in 2 or 3 series, imbricate, broadly scarious attheapex; rays large, 

 white; achenes cuneate, compressed, triquetrous; pappus none. 



1. Leucampyx newberryi A. Gray in Port. & Coult. Syn. Fl. Colo. 77. 1874. 



Type locality: "New Mexico." 



Range: Colorado to Arizona and New Mexico. 



New Mexico: Rio Pueblo; Santa Ye and Las Vegas mountains. Open parks and 

 meadows in the mountains, in the Transition and Canadian zones. 



On Crews Mesa near Beulah Professor Cockerell found a form with pink rays. 



103. CHAENACTIS DC. 



Low annuals or perennials with alternate, pinnately dissected leaves and peduncu- 

 late, solitary or cymose heads of flesh-colored flowers; receptacle flat, naked; heads 

 rayless but the marginal flowers usually enlarged; achenes slender, pubescent; pap- 

 pus of 4 lanceolate hyaline scales. 



key to the species. 



Perennial ; divisions of the leaves pinnatifid or toothed 1. C. douglasii. 



Annual; divisions of the leaves mostly entire 2. C. stevioides. 



1. Chaenactis douglasii (Hook.) Hook. & Am. Bot. Beechey Voy. 354. 1840. 

 Hymenopappus douglasii Hook. Fl. Bor. Amer. 1: 316. 1830. 



Type locality: "Common on the barren dry sandy groimds of the Columbia, from 

 the 'Great Falls' to the Rocky Mo im tains." 

 Range: Washington and Montana to California and New Mexico. 

 New Mexico: Dulce (Standley 8204). Sandy slopes, in the Transition Zone. 



2. Chaenactis stevioides Hook. & Am. Bot. Beechey Voy. 353. 1840. 

 Type locality: "Snake coim try," Idaho. 



Range: Idaho and Nevada to New Mexico and Arizona. 



New Mexico: Aztec; Mangas Springs; Tortugas Mountain; Organ Mountains. Dry 

 plains and hills, in the Lower and Upper Sonoran zones. 



104. BAERIA Fisch. & Meyer. 



Low slender annual with opposite entire sessile leaves and slender-pedunculate 

 terminal heads of yellow flowers; rays yellow, showy; involucre campanulate, of 

 many narrow bracts, these somewhat carinate, at least below; achenes clavate-Linear 

 to linear-cimeate; pappus of 3 or 4 awn-bearing paleae. 



